I understand how you’re feeling not wanting to expose bubby to anything unnecessary... My GP and Hossy told me not to worry over brown blood, because it usually means it's old if it's brown and where ever the bleeding is coming from it is only a very small quantity hence it takes a while to make it into your panties and makes it old blood if that makes any sense.

Keep in mind that you also want to feel comfortable with your pain, if your getting quite uncomfortable you are more likely prone to stress which isn't good for the baby! It must though be nerve racking having to wait for such a long period for you Dr..